Search U.S. government technical reports digitized or harvested by TRAIL.
The ores of copper, lead, gold and silver
Bureau of Mines investigates gold in oil shales and its possible recovery
Simple treatment methods for oxide gold and silver ores
Extraction of gold from carbonaceous ores :pilot plant studies
Improvements in heap leaching to recover silver and gold from low-grade resources
Application of petrographic techniques to assess in situ leach mining potential